Issue Summary

When the timeline is collapsed, the user is unable to resize any fields to be bigger. It's also impossible to make a field smaller without expanding the timeline, then having to collapse it again. This makes it hard to use Advanced Roadmaps as a table / list view.

This is reproducible on Data Center: yes

Steps to Reproduce

1. Drag the line separating the timeline and fields to the right edge of the screen, collapsing the timeline.
2. Try to resize another column

Expected Results

When trying to increase the size of a column, the columns on the right should reduce in size to fit all the columns.

When trying to decrease the size of a column, the columns on the right should increase in size, and not expand the timeline, unless the field is the last field column, the one next to the timeline.

Actual Results

Unable to increase the size of any column when the timeline is collapsed

Decreasing the size of a column expands the timeline again.

Workaround

Reduce the size of the last field column to expand the timeline > adjust the size of all the columns > then expand the last column to collapse the timeline again.